Bug ID 671725: Connection leak on standby unit

Last Modified: Jul 18, 2026

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 13.0.0, 13.0.0 hf1, 13.0.0 hf2, 13.0.0 hf3, 13.0.1

Fixed In:
13.1.0, 12.1.3.7

Opened: Jun 29, 2017

Severity: 3-Major

Related Article: K19920320

Symptoms

High connection count on standby unit.

Impact

Flow leak on Next Active action.

Conditions

-- High availability (HA) configuration. -- Virtual server that has the attribute 'spanning enabled'.

Workaround

None.

Fix Information

Connection leak on standby unit no longer occurs under these conditions.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips